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Reti wsn e applicazione in fase di incendi
1.
Reti WSN e
applicazione in fase di incendi forestali Luigi La Torre 19 Dicembre 2011
2.
Problema • Centinaia di
migliaia di ettari distrutti ogni anno • 94 persone morte nel 2007 in Grecia e California 2
3.
Obiettivo • Costruire sistemi
che individuino un incendio tempestivamente 3
4.
Approccio • Image processing:
– Video camera/ Foto camera – Satellite • Network: – Wireless Sensor Network 4
5.
Problematiche WSN • Scalabilità
e reliability del sistema • Comunicazione tra i vari nodi • Consumo energetico 5
6.
Architettura del sistema 1.
Comunicazione 2. WSN Server Router 3. Stazione centrale 6
7.
Comunicazione (1)
ZigBee Bluetooth Wi-Fi GPRS/GSM 802.15.4 802.15.1 802.11b Battery Life 100-1000+ 1-7 1-5 1-7 (days) Bandwidth 20-250 720 11000+ 64-128 (kbps) Range 1-500+ 1-10+ 1-100 1000+ (meters) Reliable, Low Key Cost, Speed, Power, Cost- Reach, Quality Attributes Convenience Flexibility effective System 4KB-32KB 250KB+ 1MB+ 16MB+ Resource Application Monitoring & Cable Web, Video, WAN, Focus Control Replacement Email Voice/Data Tabella protocolli1 1. Uniplan 7
8.
Comunicazione (2)
• ZigBee (802.15.4): – Basso consumo: 21 mA Rx - 29 mA Tx 1 – Duty cycle: 99% sleep – Estensibile • Strategie per la definizione di path 1. Fonte 8
9.
Comunicazione (3)
• MRMS (Multipath Routing Multiple Sink)1 1. MRMS 9
10.
Waspmote (Libelium)1
• 92 tipi di composizione • Batteria: 6600mA - 13000mAH • Consumi: – ON: 9 mA – Sleep: 62 µA – Hibernate: 0,7 µA • Range: – 50 mW => 7000 m – 2 mW => 500 m • Costo: 100 - 200 € 1. Libelium 10
11.
Stazione centrale • Analizza
i dati provenienti dai nodi sensore • Avverte il pronto intervento indicando la zona in cui è scattato l’allarme 11
12.
Costo tecnologico • Waspmote
(Gases + GPS) 150 € • Per una superficie di 400 ha 30.000 € 12
13.
Valutazione sistema • Scalabile •
Reliability alta • Cost-effective 13
14.
Grazie
14
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